REACTION OF DEGENERATION

\ɹɪˈakʃən ɒv dɪd͡ʒˌɛnəɹˈe͡ɪʃən], \ɹɪˈakʃən ɒv dɪd‍ʒˌɛnəɹˈe‍ɪʃən], \ɹ_ɪ__ˈa_k_ʃ_ə_n ɒ_v d_ɪ_dʒ_ˌɛ_n_ə_ɹ_ˈeɪ_ʃ_ə_n]\
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1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe